Eye refraction can be correct {emmetropia}, neither near-sighted nor far-sighted.
Far-sightedness {hyperopia} {hypermetropia} {far-sightedness} {presbyopia} results if eye length is too short. Hyperopia usually develops soon after birth. One person in three is hyperopic.
Near-sightedness {myopia}| {near-sightedness} results if eye length is too long. Myopia usually develops in early teens. One person in five is myopic. Near-sightedness makes reds more prominent.
4-Medicine-Disease-Kinds-Organ-Nerve-Eye
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Date Modified: 2022.0225